I went slightly different method again on mine - kettle souring. I pulled the bag of grain at the end of the mash, let the temp drop to high 40s and added a hop bag with around 500g of uncracked pilsner malt to inoculate with lacto. I then hooked up my OTS element to a temp controller, dialled in 40C covered it all up and left it for 48 hours. After that, I removed the grain and did a 30 min boil to pasteurise. Fermented with notto at 16C. Has been in the bottle for only 1.5 weeks, but tasted great at the end of fermentation.
Didn't bottle the whole batch though - about 9L was racked onto blueberries for something different...
Didn't bottle the whole batch though - about 9L was racked onto blueberries for something different...